Other mistake: Near the end of the film, when Illya's superior asks about Dr. Teller's research, a subtitle reads "whoever hold's that disc can control the world." As, in context, it is a plural, not a possessive, "hold's" should be "holds." (01:45:10)
Other mistake: During the "escape from East Berlin" sequence, Kuryakin fires a single shot at Gaby's car. Aside from the extremely unlikely possibility of hitting anything like a tire with a handgun from more than half a block away, we see just her left rear tire deflated and shredding off the rim. For the rest of the sequence, sparks fly from both rear wheels as she and Solo avoid capture.
Other mistake: When Illya is having his briefing on Solo, he's told Solo joined the army at 18 and stayed on in Europe after the war. In character profiles during the final credits Solo's date of birth is given as 1929. That would make him 18 in 1947, after the war had already finished.